Datasheet LT3470 (Analog Devices) - 3

LT3470
ORDER INFORMATION AUTOMOTIVE PRODUCTS**
LT3470EDDB#WTRMPBF LT3470EDDB#WTRPBF LBPN 8-Lead (3mm × 2mm) Plastic DFN –40°C to 85°C LT3470IDDB#WTRMPBF LT3470IDDB#WTRPBF LBPP 8-Lead (3mm × 2mm) Plastic DFN –40°C to 125°C LT3470HDDB#WTRMPBF LT3470HDDB#WTRPBF LCNR 8-Lead (3mm × 2mm) Plastic DFN –40°C to 150°C Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.
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Versions of this part are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. These models are designated with a #W suffix. Only the automotive grade products shown are available for use in automotive applications. Contact your local Analog Devices account representative for specific product ordering information and to obtain the specific Automotive Reliability reports for these models.
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 10V, VSHDN = 10V, VBOOST = 15V, VBIAS = 3V unless otherwise specified. PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage l 4 V Quiescent Current from VIN VSHDN = 0.2V 0.1 0.5 µA VBIAS = 3V, Not Switching l 10 18 µA VBIAS = 0V, Not Switching 35 50 µA Quiescent Current from Bias VSHDN = 0.2V 0.1 0.5 µA VBIAS = 3V, Not Switching l 25 60 µA VBIAS = 0V, Not Switching 0.1 1.5 µA FB Comparator Trip Voltage VFB Falling l 1.228 1.250 1.265 V FB Pin Bias Current (Note 3) VFB = 1V, E- and I-Grade 35 80 nA l 35 150 nA H-Grade l 35 225 nA FB Voltage Line Regulation 4V < VIN < 40V 0.0006 0.01 %/V Minimum Switch Off-Time (Note 5) 500 ns Switch Leakage Current 0.7 1.5 µA Switch VCESAT ISW = 100mA (TS8 Package) 215 300 mV ISW = 100mA (DD8 Package) 215 mV Switch Top Current Limit VFB = 0V 250 325 435 mA Switch Bottom Current Limit VFB = 0V 225 mA Catch Schottky Drop ISH = 100mA (TS8 Package) 630 775 mV ISH = 100mA (DD8 Package) 630 mV Catch Schottky Reverse Leakage VSW = 10V 0.2 2 µA Boost Schottky Drop ISH = 30mA 650 775 mV Boost Schottky Reverse Leakage VSW = 10V, VBIAS = 0V 0.2 2 µA Minimum Boost Voltage (Note 4) l 1.7 2.2 V BOOST Pin Current ISW = 100mA 7 12 mA SHDN Pin Current VSHDN = 2.5V 1 5 µA SHDN Input Voltage High 2.5 V SHDN Input Voltage Low 0.2 V Rev. E For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Related Parts